Jenkins blueocean plugin - Unable to create pipeline from github

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Getting below error in Jenkins during the last step of creating pipeline from github using personal access token -

Sep 03, 2017 7:34:43 AM com.squareup.okhttp.internal.Platform$JdkWithJettyBootPlatform getSelectedProtocol
INFO: ALPN callback dropped: SPDY and HTTP/2 are disabled. Is alpn-boot on the boot class path?
  • Jenkins ver. 2.78
  • openjdk version "1.8.0_141"

I am running jenkins using vagrant inside CentOS 7.

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vivekyad4v On

It worked fine after changing my machine from Mac OS to Ubuntu & upgrading the blueocean plugin to "1.3.0-beta-2".

The reason could be proxy or some other setting which was not allowing the communication to happen.

Since it took fair amount to time to debug, I hope someone else doesn't waste their time & check their machine configs before putting a bug.